Make ServletContext Optional

Fixes gh-318

spring-session/src/test/java/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2002-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.session.data.redis.config.annotation.web.http;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.data.redis.connection.RedisConnection;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * @author Rob Winch
+ *
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration
+public class RedisHttpSessionConfigurationClassPathXmlApplicationContextTests {
+
+	// gh-318
+	@Test
+	public void contextLoads() {}
+
+	static RedisConnectionFactory connectionFactory() {
+		RedisConnectionFactory factory = mock(RedisConnectionFactory.class);
+		RedisConnection connection = mock(RedisConnection.class);
+		when(factory.getConnection()).thenReturn(connection);
+
+		return factory;
+	}
+}